engineering physics MCQ #243

A capacitor of capacitance 100 μF is connected to an AC source. If the reactance is 20 Ω, the frequency is

engineering physics MCQ #243

  1. Question 1

    Q1. A capacitor of capacitance 100 μF is connected to an AC source. If the reactance is 20 Ω, the frequency is

    • A) 50 / π Hz
    • B) 100 Hz
    • C) 50 Hz
    • D) 100 / π Hz

    Answer: 50 / π Hz

    Explanation: Xc = 1 / (2πfC). So, f = 1 / (2πXcC) = 1 / (2π * 20 * 100 * 10^(-6)) = 50 / π Hz.